Device for perforating figured iron.



H KOBPPLINGBR DEVICE FOR PERFORMING HGUBBD IRON.

APPLIOATIOX FILED H1318, 191i.

Patented Aug. 4, 1914 TH NORII! PITKRS CO.. PHOTOd-ITHG. WAIHINGTON. D C

HERMANN KOEPPLINGER, 0F VIENNA, AUSTRIA-HUNGARY.

DEVICE FOR PERFORATING FIGURED IRON.

Specification of Letters Patent.

Patented Aug. 4, 191

Application flied February 26, 1912. Serial No. 679,925.

To all whom it may concern:

Be it known that I, HERMANN Konrrnmone, a subject of the Em eror of Austria- Hunga residing at 23 erklotzgasse Vienna, 1 V, in the Empire of Austriaungary, have invented new and useful Improvements in Devices for Perforating Figured Iron, of which the following is a specification.

The present invention is a further development of the device for perforating figured iron described in my U. S. Letters Patent No. 989159.

The invention by means of apeculiar formation of the 'punch and the swage enables perforations bounded at one end by a bent fian e, and at the other end by a bent web brid ge to be made in one operation. This articular kind of perforation, which is own per 86, has hitherto been produced by the use of several tools as can be seen for example from the specification of German Patent No. 184018.

The present invention relates to means for perforating figured window irons having a curved flange opening and a curved web bridge opening. This form of iron is wellknown in the art, and the usual manner of producing or forming the same prior to my invention was to form the perforations in the web material by the gradual operation of a plurality of tools. In the course of this operation the web was bent up and down across suitable cross bar bearings, resulting in a very substantial weakening of the material of the web. Moreover, after using perforating mechanisms such as heretofore employed, fairly extensive finishing of the transverse openings or slots was required because despite the greatest care which could be exercised it was not possible to obtain a clean cut erforation in one single operation.

The ob ect of my invention is to obviate the disadvantages inhering in existin methods, and I accomplish this object by orming the opening in the iron b a single tool, consisting of an edged or an ed central portion, rovided at both si es with curved jaws aving knife-like cutters for the production of the flange openings and web bridge openings.

Now I have found by exhaustive experiments that it is possible by means of a further develo ment of the devices described Letters Patent No. 989159 to produce by means of a single tool and in a single operation the particular kind of perforation in question. This result is made possible by a peculiar formation of the punch in conjunction with a peculiarly con structed swage.

In the drawing Figure 1 shows the form of the opening or perforation known per so, in a longitudinal bar. Fig. 2 shows in pers ective view the new tool for the production of the opening. Fig. 3 shows a modification. Fig. 4 shows the improved swagc comprisin a new part for receiving the web portion of the figured iron and the known dove-tail guide for the swage portion receiving the flange of the iron. Fig. 5 shows in perspective view the part of the swage for receiving the flange of the iron. Fig. 6 ihows a plan of the finished perforated iron The improved tool consists of a prismatic body 1, upon the front face of which are provided the cutting and bending jaws 2 for the production of the opening 2' obtained by the bending of the flange. Upon the back of the middle portion of the tool are provided peculiarly shaped cutting and bending jaws 3 for producing the web opening 3' bounded by the web bridge. The jaw 3 rises, in the construction shown, from a slightly higher point on the central portion of the tool than the flange bending jaws 2 and is rovided on its edges with cutters i and 5 aving as small a cutting angle as possible.

The part 9 of the swage for receiving the flange m of the blank is identical with the part 9 of the swage shown in the U. S. Letters Patent No. 989159. As is described in the said Letters Patent there is provided in this part of the swage a plate 13 which. supports the flange a: and yields gradually in roportion as tie tool is forced down.

o revent the web 3 of the channel iron be ng nt down during the punchin of the middle slot in the web and the hen ing of the web bridge there is provided according to the resent invention in that half of the swage 0 which receives the web of the blank a movable block 21 which by its face 22 suports the web bridge while it is bent out.

h s supporting block is pressed by a strong spring 2 against the too and yields in pro portion as the bending of the web bridge proceeds.

The depth t of the slot receiving the work corresponds to the height h of the web of the blank plus the height 71- of the web bridge. The breadth b of the slot for the introduction of the tool corresponds to the thickness of the web of the channel iron. .The de th '10 of the opening d through which the too is passed corresponds with the depth to of the middle portion 1 of the too When the tool is pressed down through the opening 0 in the swa against the blank held therein, the rectang e 8 (see Fig. 1) is first punched out of the web. On the further descent of the tool the flange of the channel iron is separated from the web and bent out in the well known way and the contour of the opening formed by the bent out flange thus gradualliy developed. At this time the cutters 4 an 5 of the web brid e bender come into action and cut out in the web of the channel iron the lateral slits required for the bending out of the web bridges. On the further descent of the tool the flange opening1 is further bent out to the normal size an at the same time the web bridge is bent out by the jaw 3. As all the perforating, cutting and bending deformations take place while the material operated upon is incloscd on all sides, the contour of the opening produced by the new device must always correspond in all details with perfect accuracy with the final contour of the punching tool used. By this means all subsequent treatment of the contour of the hole is rendered superfluous notwithstanding the considerablv sim lified method of production. It is advisab e to make the web bridge bender 3 see Fig). 3) together with its outters interc an ea ier method 0 production of the tool, the punch can in this case be employed as a universal tool for punching out various kinds of web profiles.

le as, apart from the eas I claim 1. In means for making perforations in figured iron bounded by a bent out flange portion and a bent out web-bridge, a punch which consists of a bender provided with cutters corresponding to the erforation in the bent out flan e portion oft 1e work piece, a prismatic middle portion corresponding to the central perforation of the web of the work piece and a second bender provided with knife like cutters correspondin to the perforation in the bent out web bri ge portion of the work piece.

2. In means for making perforations in figured iron bounded by a bent out flange portion and a bent out web bridge, a punch which consists of a bender provided with cutters corresponding to the perforation in the bent out flangie ortion of the work piece, a prismatic mi d e portion corresponding to the central perforation of the web of the work piece and a second bender corresponding to the perforation in the bent out web bridge, said bridge-bender being attached interchangeably to said flange bender.

3. In means for making erforations in figured iron bounded by a iient out flange portion and a bent out web bridge, the comination with a swage for holding the tigured iron of a tool ided rectilinearly by the swage in the dlrection of the figured iron, said swage having means for supporting the web of the figured iron and elastic pressure means by which said supporting means are held against the penetrating tool during its descent.

In testimony whereof I have signed my name to this specification in the presence oi two subscribin witnesses.

HERIIANN KOEPPLINGER.

Witnesses:

AUoUs'r Foooen, Am MARIA Banana.

of thil patent may be obtained for an cent: each, by addressing the Commissioner of Patents Welhington, D. 0." 

